An order is created in the New status. What API method can be used to approve/provision it?
The API method OrderStatusChange_API can be used. An example request can be found in the documentation.
Please note the desired status of the order must be specified as success status of the order flow transition, which means
NewOrderStatus cannot be
NW orders, it shall be the success status from NW in the change order orderflow.
You can use python script to generate md5sum from GetOrder_API result.